Introducing Almqvist while on stage in The Hives’ hometown of Stockholm in Sweden, Grohl told the crowd “this is how much I fucking love this person and the band this person is in,” before revealing that he once dressed as Almqvist for Halloween. “This person happens to be from this city, so it’s nice to be reunited with him. It’s been a long time.”

He added: “Tonight I thought it would be a good idea if we did a song together, one that we’ve never played with him before, but I think it makes perfect sense for this show. I’ve always wanted to sing this song.”

After he teased the crowd with the opening chords to Led Zeppelin’s “Stairway to Heaven’, he stopped and said: “Actually, that’s not the right song. The real song sounds like this,” before the band launched full-on into AC/DC’s “Let There Be Rock.”